Gas and air burning burner.



'J. W. FBNNEL.

GAS AND AIR BURNING BURNER.

APPLICATION FILED TERZO. 1914.

Patented May 19, 1914.

@Mam

UNITED sTATEs PATENT oEErcE.

JACOB W. FENNEL, F NEWBUB/GH, NEW YORK.

eAs AND AIR BURNING BURNER.

. Specieation of letters Patent. Patented lIay 19, 1914.

Application filed February 20, 1914. Serial No. 819,976.

To all 'whom it may concern Be it known that I, JACOB W. FENNEL, 'a

. citizen of the United States, residing at Newburgh, in the county of Orange and State of New York, have invented certain new and useful Improvements in Gas and Air Burning Burners; and-I do declare the following to bev a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements 'in air and gas mixers and more particularly to mixers of this character for gas 4and air burning burners.

The main object of the invention is to provide air supply means automatically controlled by the pressure ofthe intlowing gas:

Another object is to provide a burner having air and gas supply means both of which are automatically controlled by the pressure of the gas in the gas supply pipe.

Still another object is to provide simple and eiiicient means for admitting air to the mixing chamber and so constructed as to prevent all danger of ignition` occurring at this point should a light be held adjacent thereto.

wWith these and other objects in view, the invention consists of certain novel features of construction, and the combination and arrangement of parts as will be more fully described and claimed.

In the accompanying drawings: Figure 1 represents a side elevation of a burner equipped with this invention; Fig. 2is a vertical section thereof; Fig. 3 is a transverse section taken on the line 3 3 of Fig. 2; Fig. et is a similar view taken on the line 44 of Fig. 2.

In the embodiment illustrated the device is shown applied to an incandescent lamp burner, but, it is to be understood that it may be used in connection with any form of gas burner to which it is adapted.

'A gas supply pipe 1 is shown provided with the usual controlling cock 2 and having threaded thereon a nipple 3 which is provided `at its upperend with a laterally eX- tending base late 4 herein shown circular and having a epending peripheral] y grooved annular iange 5 to which is secured a dia.- phragm (i composed of vleather or any other suitable material and having apertured disks or plates 7 and S mounted on a nipple 9 which passes through the top'of the diaphragm. The disk 7 is disposed inside said diaphragm and is .preferably made larger than the disk 8 which is arranged outside the diaphragm, Vthe leather being clamped between them as is shown clearly in Fig. 2.

A dome shaped hood 1() incases the diaphragm 6 and is secured tothe baseplate i by any suitable means and has an opening 11 mits top through which a tube 12 passes. This tube 12 is shown detachably connected with the nipple 9 and has mounted on its upper end a casting 13, which is preferably removable. An outwardly flaring bore 14; extends through this cast-in@ and forms a gas inlet opening into a mixing chamber M and also forming a valve seat to receive a tapered needle valve 15 to be described.

Extending upwardly from the dome 10 around the opening 11 therein is a cylindrical casing 16 open at its upper end and provided in its side walls near said upper end with a. plurality of laterally spaced air inlet openings of varying lengths. Four of these openings are shown arranged diametrically opposite to each other with the top walls of all of them disposed in the same plane, while thelower walls of the oppositely disposed pair 17 extend below those of the pair 17 thus positioning the lower ends of the openings 17 and 17 1n step-like relation as shown in Fig. 1 whereby the respective pairs are broughtsuccessively into operation for a purpose to be described. If desired the walls of the casing 16 between the openings 17 may be perforated as shown at 18 in Fig. 1 and said apertures coperate willi the openings 17 for admitting air to the mixing chamber.

A yoke 19 having resilient arms 20 .provided with laterally extending terminal fingers 21 is mounted in the upper end of. the casing 16 and these fingers 21 are adapted to be sprung into .slots formed in the opposite side walls of the casing 16 whereby said yoke is held in operative position. The yoke also extends through slots in the walls of the mixing chamber as wil-l be hereinafter described. The cross bar of this yoke 19 has a threaded aperture in which is adjustably mounted the needle valve 15 which is disposed opposite the bore or opening 11i in the casting 13 and is positioned for varying the size of said opening when-said Casting is moved toward or away from said valve as will be hereinafter further described. 'llhe upper end of this valve 15 is preferably made angular in cross section to receive a wrench for adjusting it, and it is also provided with a kerf to adapt a screw driver to be used for this purpose when desired.

Extending upwardly from the casting 13 is a tubular member 22 which is slidably mounted in the lower end of the feeding tube 23 of the burner to which the device is applied. (See Fig. 2.) This tube 22 has a shoulder 24 arranged intermediately of its ends which is preferably formed by enlarging the lower end of said tube, said enlarged end forming the air and gas mixing chamber. The opposite side walls of this chamber are slotted as above described to receive the yoke 19 in which the valve 15 is mounted and to admit air to the chamber. This chamber is also provided with other openings 25 for admitting air thereto.

A shutter 26 is herein shown in the form of a tube telescopically engaged with the cylinder casing 16 and having a cap 27 at its upper end slidably mounted on the tube 22, the lower or downward movement thereof being limited by the engagement of the walls of the opening in the cap, through which said tube passes,lengaging the shoulder 24 formed by the upper end of the mixing chamber and by means of which said shlijitter is carried by and moved with said tu e.

A coiled spring 28 surrounds the tube 22 and is arranged between the upper end of the shutter and an adjusting nut 29 mounted on the lower end of the burner feed tube 23 said nut being adapted for adjusting the tension of said spring 28 to control the movement of the shutter and to hold it yieldably in operative position.

As shown the shutter extends into the casing 16 and when in its extreme lowered or closed position the lower end thereof extends below the bottom wall of the longesty opening or slot 17 in the casing 16 thereby closing all of said openings and cutting off the air supply to the burner. These openings 17 and the perforations 18 form outer air inlet orts while the openings in the walls of t e chamber form inner air inlet ports, and between the inner and outer ports the shutter 26 is adapted to operate and provides a zig-zag course for the admission of the air to the mixing chamber, thereby avoiding any danger of the gas in said mixing chamber passlng out through said openings as the tendency of the gas will be to rise and ass out through the tubes 22 and 23 to the urner and thus any danger of ignition is avoided should a lighted match or any other ame be held near the air inlet openings. v

From the above description it will be obvious that air entering through the outer ports 17 passes rst laterally into the casing 16 then upwardly between thc shutter 26 and the mixing chamber and then laterally through the openings in the side walls of the mixing chamber into said chamber where it combines with the gas admitted through the bore or'opening 14. The openings 17 and 17 in the casing 16 vary in length at their lower ends to provide for a graduated amount of air being admitted to the mixing chamber, it being obvious that when the shutter 26 is raised slowly a small amount of air will enter through the lower ends of the longest openings 17 and as this shutter rises the openings 17 will be exposed and hence a greater quantity of air will be admitted. This shutter being mounted on the tube 22 which is connected by tube 12 with the diaphragm 6 is thus moved vertically lup and down as the diaphragm expands or collapses thereby controlling the amount of air admitted, according to the pressure of the gas supply' which enters beneath the diaphragm.

The valve 15 as shown is held stationary after it is once adjusted in the yoke 19 and it controls the amount of gas entering the mixing chamber accordingly as the casting 13 is raised or lowered by the tube 12 which is actuated by the pressure of the gas under the diaphragm 6. .It will thus be obvious that the gas pressure controls the admission of both the air and gas to the mixing chamber, the valve 15 having been first adjusted to permit predetermined amount ot' gas to enter through the opening 14.

In the operation of the device when the gas in the burner is to be lighted the shutter 26 is in normal closed position thereby cutting off all air supply from the mixing chamber. Immediately the cock 2 is opened the rich gas will ilow through pipe 1 and pass directly up through the tubes 12, 22 and 23 to the burner without any air having been mixed therewith and this rich gas being lighted in the burner will avoid the explosion which usually occurs in burners ot' this character when the gas is irst lighted. After the gas is lighted it expands under the diaphragm 6 and forces said diaphragm upwardly carrying with it the tubes 12 and 22, and consequently the shutter 26, thereby gradually opening the air inlet ports and permitting the air to flow into the mixing chamber and there mix with the gas which enters through the port 14, it being obvious that as the size of the air inlet ports is increased the size of the gas inlet port is decreased as the casting 13 is raised, causingr the valve 15 to project into said opening 14 and gradually reduce the size thereof.

I claim as my invention:

1. The combination with a gas burner of an air and gas mixing chamber, a vibrator-y member automatically controlled by thc pressure of the gas supply, said chamber having gas and air inlet ports, means for varying the size of said air and gas inlets, and means connected with and controlled by said vibratory member for1 simultaneously operating the size varying means of saidair and gas inlets to enlarge or reduce the size thereof according to the pressure of the gas supply. I

2. The combination with a gas burner of an air and gas mixing chamber, a vibratory member automatically` controlled by the pressure of the gas supply, said chamber having air and gas inlets, a shutter for controlling the air admission inlet, and a member connected withv said vibratory member for actuating said shutter to vary the amount of air admitted to said chamber.`l

3. The combination with a gas burner of an air'and gas mixing chamber, a vibl'atory member automatically controlled by the pressure of the gas supply, said chamber having' air and gas inlets, a shutter for controlling the air admission inlet, avalve for controlling the gas admission inlet, and

a member connected with said vibratory member for operating said shutter and for varying the relative positions of said valve and said gas inlet whereby the admission of gas and air is automatically controlled by said vibrator-y member according to the pressure of the gas supply.

4. The combination with a gas burner of a gas and air mixing chamber having air and gas inlets, a cylinder surrounding said mixing chamber and provided with openings in the side walls thereof, a shutter vertically movable between the walls of said mixing chamber and said cylinder, a vibratory member automatically controlled by the pressure of the gas supply', a valve arranged for coperation with said gas inlet, andl means `connected with said vibratory member for raising and lowering said shutter and for varying the relative positions of said valve and gas inlet according to the pressure of the gas supply.

5. The combination with a gas burner mixin i plane and their having a fuel feeding tube, an air and gas chamber having a tubular extension s idably engaged with said feeding tube, said mixing chamber having air inlet l ports in the side walls thereof, a gas inlet .port in its botto1n,.a vibratory member automatically controlled.- by the pressure of the gas supply, a tube connecting said vibratory member with said mixing chamber whereby said mixing chamber is moved by said vibratory member, a cylinder surroundlng said mixing chamber and having openings 1n the sidewalls thereof of varying lengths, a shutter carried by said mixing chamber and telescopically l engaged with said cylinder, and a valve arranged for cooperation with the gas inlet for varying the size thereof on the raising and lowering of said vibratory member, said shutter being simultaneously raised and lowered for controlling the air supply.

6. The combination of a gas supply pipe, a gas chamber communicating therewith and having a flexible diaphragm, a 'dome shaped casing encircling said chamber and having an upwardly extending cylindrical member open at its outer end, said member having longitudinally extending openings therein arranged with their upper ends in the same lower ends disposed in steplike relation whereby the length of said openings is varied, a gas burneigan air and mixing chamber connected therewith and with said {iexible diaphragm, said chamber having air and gas inlets and extending into said cylinder, and a vertically movable shutter carried by said chamber and extending vinto said cylinder for controlling the air supply according to the vpressure of the gas supply.

In testimony whereof-I have hereunto set `my hand in presence of two ysubscribing wit- IIBSSGS,

C. E. HUNT, L. O. HILTON. 

